CN102773655B - Repairing method of steam turbine rotor fir type wheel groove - Google Patents
Repairing method of steam turbine rotor fir type wheel groove Download PDFInfo
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- CN102773655B CN102773655B CN201210253142.XA CN201210253142A CN102773655B CN 102773655 B CN102773655 B CN 102773655B CN 201210253142 A CN201210253142 A CN 201210253142A CN 102773655 B CN102773655 B CN 102773655B
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Abstract
The invention provides a repairing method of a steam turbine rotor fir type wheel groove and particularly relates to a repairing method after the steam turbine rotor fir type wheel groove is processed wrongly. The repairing method solves the problem that a whole rotor is scrapped due to the fact that the steam turbine rotor fir type wheel groove cannot be repaired after being processed wrongly. The repairing method includes specific steps: step one, removing a wrongly-processed impeller; step two, processing a dovetail notch; step three, processing a fir type wheel groove for assembling an insert, and milling the fir type wheel groove at the bottom of a rectangular opening of the wrongly-processed impeller; step four, designing the insert, adopting a fir type blade root structure of a blade at the bottom of the designed insert, and enabling a blade root molded line at the bottom of the insert to be consistent with a molded line of the fir type wheel groove processed in the step three; step five, installing the insert; and step six, sealing the dovetail notch. The repairing method is used for repairing the steam turbine rotor fir type wheel groove after the steam turbine rotor fir type wheel groove is processed wrongly.
Description
Technical field
The present invention relates to a kind of restorative procedure, be specifically related to the restorative procedure after a kind of turbine rotor fir-tree type race processing mistake, belong to Machining Technology field.
Background technology
Rotor is the core component of steam turbine product, rotor is the dynamic equilibrium state in running up in the time of unit operation, rotor each several part structure in service is born huge centrifugal action, once rotor processing mistake, do not allow to reuse after repair welding, once repair welding body comes off in the time that rotor high-speed turns round, consequence is hardly imaginable.The processing of impeller of rotor groove is very important key link in whole rotor mechanical process.Rotor fir-tree type race uses profile milling cutter processing, removes surplus large, once processing occurs mistake will causing scrapping of whole roots rotor, causes millions of to up to ten million huge economic losses.But, owing to having unavoidably the situation of processing error under the many factors effects such as equipment, personnel and method of operating, the reparation problem after impeller of rotor groove processing mistake, is a difficult problem of turbine rotor processing manufacturing industry in production reality always.
Summary of the invention
The object of the invention is cannot repair after solving existing turbine rotor fir-tree type race processing mistake, the problem that causes whole roots rotor to be scrapped, and then a kind of restorative procedure of turbine rotor fir-tree type race is provided.
The present invention addresses the above problem the technical scheme of taking to be: the concrete steps of the restorative procedure of a kind of turbine rotor fir-tree type race of the present invention are:
Step 1, the part of the wrong impeller of processing is removed, remove together with the peripheral part of the upper v-notch closing on comprising a wrong v-notch of processing on impeller, two v-notch of mill off and peripheral part form the opening that is shaped as rectangle of a longitudinal section, the bottom surface of peripheral part to the distance of rotor outer circle face is 4mm～6mm, the width of impeller is less than the length of peripheral part, and the width of v-notch is less than the width of peripheral part;
Step 2, processing dovetail groove orifice, on the rotor outer circle between the larger level impeller of processing wrong impeller and be adjacent, process a dovetail groove, ensure that the degree of depth of fir-tree type race to be processed is less than the degree of depth of dovetail groove, the to be designed bottom leaf of inserting is less than the length of dovetail groove with length, the width of fir-tree type race to be processed is less than the width of dovetail groove;
Step 3, process and assemble are inserted and are used fir-tree type race, at the bottom milling fir-tree type race of the rectangular aperture of the wrong impeller of processing;
Step 4, design are inserted, the bottom of inserting of design adopts the fir-tree root structure of blade, the top of inserting of design is cuboid, match with rectangular opening, the bottom blade-root molded line of inserting is consistent with the molded line of the fir-tree type race through step 3 processing, and the length of fir-tree type race is less than the bottom blade root length of inserting, and the width of impeller is less than the top length of inserting, the top length of inserting is less than the length of peripheral part, and the width of peripheral part is less than the top width of inserting;
Step 5, installation are inserted, inserting of having designed is installed on the fir-tree type race of step 3 processing, when assembling at the bottom of fir-tree type race choker block sheet by the bottom blade root jack-up of inserting, bottom blade root load-carrying surface and fir-tree type race that guarantee is inserted fit tightly, measure the width of peripheral part, the top width that repair is inserted according to width, make to insert install after and impeller to fit tightly be that 0.02 clearance gauge does not enter;
Step 6, envelope dovetail groove orifice, first and second of assembled in sequence, carry out brush to first and second with dovetail groove contact-making surface, guarantee fits tightly 0.02 clearance gauge and does not enter, after first and second installs, with drift by the opening swelling between first and second, opening size between measuring first and second, according to the 3rd of measured value repair, the 3rd after processing is packed into, beat the 3rd until tensioner, then, with argon arc welding by first, locate groove and weld for second and the 3rd, reparation completes, can again process race.
The invention has the beneficial effects as follows: the present invention is simple and easy to do, exploitativeness is strong, after unit actual motion, confirm that restorative procedure is safe and reliable, after having solved existing turbine rotor fir-tree type race processing mistake, cannot repair, cause the problem of scrapping of whole roots rotor, restorative procedure of the present invention to mistake processing, (process in the process of rough milling race calibration mistake and rough milling by the first cutter, half finish-milling, the mistake of processing wheel groove depth in finish-milling process) race repair after, impeller is returned to undressed state before, can re-start again race processing, be significant for remedying after the processing of rotor groove mistake, retrieve heavy economic losses, improve Business Economic Benefit.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of the rotor of combination of the present invention, Fig. 2 is the structural representation of processing wrong impeller in Fig. 1, Fig. 3 is that the A-A of Fig. 2 is to view, Fig. 4 is the structural representation that is processed with dovetail groove on the rotor outer circle between impeller, Fig. 5 is that the B-B of Fig. 4 is to view, Fig. 6 is the structural representation of processing the fir-tree type race of processing on wrong impeller, Fig. 7 is that the C-C of Fig. 6 is to view, Fig. 8 is the structural representation of inserting, Fig. 9 is that the D of Fig. 8 is to view, Figure 10 is provided with the structural representation of inserting on the wrong impeller of processing, Figure 11 is that the E-E of Figure 10 is to view, Figure 12 is the structural representation of dovetail groove sealed condition.
Detailed description of the invention
Detailed description of the invention one: in conjunction with Fig. 1-Figure 12, present embodiment is described, the concrete steps of the restorative procedure of a kind of turbine rotor fir-tree type race of present embodiment are:
Step 1, the part of impeller wrong processing is removed, remove together with the peripheral part 1-2 of a upper v-notch 1-1 who closes on comprising a wrong v-notch 1-1 of processing on impeller 1, two v-notch 1-1 of mill off and peripheral part 1-2 form the opening 1-6 that is shaped as rectangle of a longitudinal section, the bottom surface 1-2-1 of peripheral part is to the rotor outer circle face between rotor outer circle face 1-4(impeller 1 and the less level impeller that is adjacent) distance K1 be 4mm～6mm, the width L1 of impeller 1 is less than the length L 2 of peripheral part 1-2, the width H2 of v-notch 1-1 is less than the width H1 of peripheral part 1-2,
Step 2, processing dovetail groove orifice, on the rotor outer circle 1-5 between the larger level impeller of processing wrong impeller 1 and be adjacent, process a dovetail groove 2, ensure that the depth D 2 of fir-tree type race 1-3 to be processed is less than the depth D 1 of dovetail groove 2, the to be designed 3 bottom leaves of inserting are less than the length L 3 of dovetail groove 2 with length L 5, the width H4 of fir-tree type race 1-3 to be processed is less than the width H3 of dovetail groove 2;
Step 3, process and assemble are inserted and are used fir-tree type race, at the bottom milling fir-tree type race 1-3 of the rectangular aperture 1-6 of the wrong impeller 1 of processing;
Step 4, design are inserted, 3 the bottom of inserting of design adopts the fir-tree root structure of blade, 3 the top of inserting of design is cuboid, match with rectangular opening 1-6,3 the bottom blade-root molded line inserted is consistent with the molded line of the fir-tree type race 1-3 through step 3 processing, the length L 4 of fir-tree type race 1-3 is less than 3 the bottom blade root length L 5 of inserting, the width L1 of impeller 1 is less than 3 the top length L6 that inserts, 3 the top length L6 of inserting is less than the length L 2 of peripheral part 1-2, and the width H1 of peripheral part 1-2 is less than 3 the top width H5 that inserts;
Step 5, installation are inserted, inserting of having designed 3 is installed on the fir-tree type race 1-3 of step 3 processing, when assembling, 3 bottom blade root jack-up will be inserted at the bottom of fir-tree type race 1-3 choker block sheet, insert 3 bottom blade root load-carrying surface and fir-tree type race 1-3 of guarantee fits tightly, measure the width H1 of peripheral part 1-2, repair 3 the top width H5 that inserts according to width H1, after 3 installations that make to insert, fitting tightly with impeller 1 is that 0.02 clearance gauge does not enter;
Step 6, envelope dovetail groove orifice, first 4 and second 6 of assembled in sequence, carry out brush to first 4 and second 6 with dovetail groove 2 contact-making surfaces, guarantee fits tightly 0.02 clearance gauge and does not enter, after first 4 and second 6 installs, with drift by the opening swelling between first 4 and second 6, opening size between measuring first 4 and second 6, according to the 3rd 5 of measured value repair, the 3rd 5 after processing is packed into, beat the 3rd 5 until tensioner, then, with argon arc welding by first 4, second 6 and the 3rd 5 place's grooves weld, reparation completes, can again process race.
In the step 1 of present embodiment, two adjacent parts of v-notch are removed, in order to make peripheral part shape regular, two v-notch 1-1 of mill off and peripheral part 1-2 form the opening 1-6 that is shaped as rectangle of a longitudinal section, so arrange, be conducive to the insert design that top in step 4 is cuboid; Peripheral part size can contain into two v-notch completely.Present embodiment rotor groove is in the time of normal process, and what in rough milling, the first cutter processed is v-notch, processes flute profile when semifinishing is rough machined.
The dynamic balancing groove structure of the similar rotor of dovetail groove orifice in the step 2 of present embodiment, the processing of dovetail groove orifice should ensure that processing space and the inserting of step 5 of the cutter of step 3 processing fir-tree type race can be installed on impeller of rotor.
In the step 3 of present embodiment, the selection of the molded line of fir-tree type race can be determined according to the size of peripheral part (rectangular aperture) and the to be designed suffered centrifugal force size when the unit operation of inserting; The processing of fir-tree type race should be from dovetail groove orifice feed, and processing length ensures that center cutter is by the width center of the wrong impeller of processing, and working depth ensures that whole fir-tree type race molded line is positioned under the bottom surface of impeller periphery part (rectangular aperture).
The top of inserting in the step 4 of present embodiment be shaped as cuboid, match with rectangular peripheral part, the erection of being convenient to insert.
The top length of inserting in step 5 in present embodiment exceeds impeller part and should remove according to rotor fine finishining figure.
In present embodiment step 6, first, second and the 3rd is the dynamic balance weight structure that rotor is conventional, locating groove with argon arc welding by first, second and the 3rd welds, weld bond does not allow burning, slag inclusion and the defect such as lack of penetration, after weld bond polishing flushes, carries out dye penetration inspection.
Detailed description of the invention two: in conjunction with Fig. 2, present embodiment is described, in the step 1 of present embodiment, the bottom surface 1-2-1 of peripheral part 1-2 is to the rotor outer circle face between rotor outer circle face 1-4(impeller 1 and the less level impeller that is adjacent) distance K1 be 4mm～6mm.So arrange, meet design requirement and actual processing needs.Other is identical with detailed description of the invention one.
Claims (1)
1. a restorative procedure for turbine rotor fir-tree type race, is characterized in that: the concrete steps of described restorative procedure are:
Step 1, the part of impeller wrong processing is removed, remove together with the peripheral part (1-2) of the upper v-notch (1-1) closing on comprising the wrong v-notch (1-1) of processing on impeller (1), two v-notch (1-1) of mill off and peripheral part (1-2) form the opening that is shaped as rectangle (1-6) of a longitudinal section, the bottom surface (1-2-1) of peripheral part to the distance (K1) of rotor outer circle face (1-4) is 4mm～6mm, the width (L1) of impeller (1) is less than the length (L2) of peripheral part (1-2), the width (H2) of v-notch (1-1) is less than the width (H1) of peripheral part (1-2),
Step 2, processing dovetail groove orifice, rotor outer circle (1-5) dovetail groove of upper processing (2) between the larger level impeller of processing wrong impeller (1) and be adjacent, ensure that the degree of depth (D2) of fir-tree type race (1-3) to be processed is less than the degree of depth (D1) of dovetail groove (2), to be designed (3) bottom leaf of inserting is less than the length (L3) of dovetail groove (2) with length (L5), the width (H4) of fir-tree type race (1-3) to be processed is less than the width (H3) of dovetail groove (2);
Step 3, process and assemble are inserted and are used fir-tree type race, at the bottom milling fir-tree type race (1-3) of the rectangular aperture (1-6) of the wrong impeller (1) of processing;
Step 4, design is inserted, the bottom of insert (3) of design adopts the fir-tree root structure of blade, the top of insert (3) of design is cuboid, match with rectangular opening (1-6), the bottom blade-root molded line of (3) of inserting is consistent with the molded line of the fir-tree type race (1-3) through step 3 processing, the length (L4) of fir-tree type race (1-3) is less than the bottom blade root length (L5) of insert (3), the width (L1) of impeller (1) is less than the top length (L6) of insert (3), the top length (L6) of (3) of inserting is less than the length (L2) of peripheral part (1-2), the width (H1) of peripheral part (1-2) is less than the top width (H5) of insert (3),
Step 5, installation are inserted, insert (3) that designed are installed on the fir-tree type race (1-3) of step 3 processing, when assembling will the insert bottom blade root jack-up of (3) of the bottom of fir-tree type race (1-3) choker block sheet, insert bottom blade root load-carrying surface and the fir-tree type race (1-3) of (3) of guarantee fits tightly, measure the width (H1) of peripheral part (1-2), the repair top width (H5) of (3) of inserting according to width (H1), after install make to insert (3) and impeller (1) to fit tightly be that 0.02 clearance gauge does not enter;
Step 6, envelope dovetail groove orifice, first of assembled in sequence (4) and second (6), first (4) and second (6) and dovetail groove (2) contact-making surface are carried out to brush, guarantee fits tightly 0.02 clearance gauge and does not enter, after first (4) and second (6) install, with drift by the opening swelling between first (4) and second (6), measure the opening size between first (4) and second (6), according to the 3rd of measured value repair (5), the 3rd (5) after processing are packed into, beat the 3rd (5) until tensioner, then, with argon arc welding by first (4), second (6) and the 3rd (5) are located groove and are welded, reparation completes, can again process race.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253142.XA CN102773655B (en) | 2012-07-20 | 2012-07-20 | Repairing method of steam turbine rotor fir type wheel groove |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210253142.XA CN102773655B (en) | 2012-07-20 | 2012-07-20 | Repairing method of steam turbine rotor fir type wheel groove |
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| CN102773655A CN102773655A (en) | 2012-11-14 |
| CN102773655B true CN102773655B (en) | 2014-09-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104162683B (en) * | 2014-05-06 | 2016-08-17 | 哈尔滨汽轮机厂有限责任公司 | The numerical-control processing method of turbine rotor sawtooth race |
| CN107953064B (en) * | 2017-11-08 | 2019-07-05 | 师宗煤焦化工有限公司 | A kind of restorative procedure of half-opened impeller |
| CN109570937B (en) * | 2018-11-05 | 2020-07-24 | 哈尔滨汽轮机厂有限责任公司 | Single-journal rotor machining method |
| CN113000864B (en) * | 2021-03-12 | 2022-08-19 | 哈尔滨汽轮机厂有限责任公司 | Use method of air inlet channel tool for heavy gas turbine compressor |
| CN115213627B (en) * | 2022-07-20 | 2023-05-05 | 华能国际电力股份有限公司 | Device for repairing damage of bacterial blade root wheel disc and assembly method |
| CN115106715B (en) * | 2022-07-20 | 2023-05-05 | 华能国际电力股份有限公司 | Device for repairing damage of fork-shaped blade root wheel disc and assembly method |
| CN115178962A (en) * | 2022-07-20 | 2022-10-14 | 华能国际电力股份有限公司 | Device for repairing damage of fir tree blade root wheel disc and assembly method |
| CN115194402A (en) * | 2022-07-20 | 2022-10-18 | 华能国际电力股份有限公司 | Wheel disc part repairing method |
| CN114986078B (en) * | 2022-07-20 | 2023-05-05 | 华能国际电力股份有限公司 | Device for repairing damage of T-shaped blade root wheel disc and assembly method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN88101320A (en) * | 1987-03-10 | 1988-09-21 | 西屋电气公司 | The weld-ring restorative procedure of high-pressure turbine rotor |
| GB8914156D0 (en) * | 1989-06-20 | 1989-08-09 | Refurbished Turbine Components | Apparatus for use in the repair of machines |
| US5172475A (en) * | 1991-12-02 | 1992-12-22 | Westinghouse Electric Corp. | Method for repairing a rotor |
| US5280849A (en) * | 1992-10-06 | 1994-01-25 | Commonwealth Edison | Welding method for rotating shafts |
| US6168382B1 (en) * | 1998-10-20 | 2001-01-02 | General Electric Co. | Turbine rotor wheel with forged replacement dovetail and method of repair |
| CN1990169A (en) * | 2005-12-26 | 2007-07-04 | 沈阳大陆激光技术有限公司 | Renovation technique of steam turbine rotor shaft fracture |
| US8182229B2 (en) * | 2008-01-14 | 2012-05-22 | General Electric Company | Methods and apparatus to repair a rotor disk for a gas turbine |
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Effective date of registration: 20221226 Address after: 150000 building 3, high tech production base, Nangang District, Harbin City, Heilongjiang Province Patentee after: HARBIN TURBINE Co.,Ltd. Patentee after: HADIAN POWER EQUIPMENT NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Address before: 150046 No. three power road 345, Xiangfang District, Heilongjiang, Harbin Patentee before: HARBIN TURBINE Co.,Ltd. |